Am I doing it wrong? - filling screen with pixels

[NÖÖB]

Hey people,
here's my first ever lua program:

Code: Select all

function love.draw()
	for ky = 0, 239 do
		for kx = 0, 319 do
			love.graphics.point( kx, ky )
		end
	end
	love.graphics.print("FPS: " .. love.timer.getFPS(), 50, 350)
end

Just filling a 320 x 240 section of the screen with pixels, and it's very slow; getting 3 FPS
Granted, my notebook (Acer Timeline) isn't very fast, but if I do the same routine in Blitz Basic, I'm getting 60 FPS..

Then I thought maybe the love.graphics.point function was slow, so I tried using .draw (1x1 pixel image) and .rect, but to no avail; about the same FPS..

[tentus]

What... why... that's the least efficient possible way to draw a rectangle. Just draw a single rectangle with a width of 320 and a height of 240.

[TechnoCat]

If you just have to be doing it pixel by pixel, look into using a framebuffer. And then only drawing your updates.

[BlackBulletIV]

Why don't you draw a 239x319 rectangle? Let the graphics engine do the work, because the more you leave stuff to Love, the better.

EDIT: Wow two posts while I was typing mine, lol.

[tentus]

But, be warned, framebuffers aren't as widely supported outside of gaming computers. I have a great work computer but it has 0 support for framebuffers, same with my netbook.

[NÖÖB]

Yeah, I forgot to mention that this was a speed test for pixel manipulation. I wanted to try and make a mode7 routine (http://en.wikipedia.org/wiki/Mode_7)

[Taehl]

Can't you just take an image and distort it? I'm pretty sure that transform matrix code that was floating around the forum would be a much better option. Better yet, just look at how this amazing demo did the ground.

[Jasoco]

Can't you just take an image and distort it? I'm pretty sure that transform matrix code that was floating around the forum would be a much better option. Better yet, just look at how this amazing demo did the ground.

No offense to the creator, but we already had that discussion. That demo doesn't really distort the images. It just makes it look like they're distorted. They're just skewed.



Löve currently has no way to distort images. If it could, it would open so many doors, but currently it can't.